I've always had that issue with vBar. I assumed that the Blue was the default system color for the app because that's the default theme on every PPC. I thought it was hardcoded to keep the footprint of the app smaller. You could try posting to their forum...
http://www.vieka.com/forum/forum.asp?FORUM_ID=8
I will post a link to this thread over there and see if it get's a response.
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Edit: Ok, I added a topic over there...
http://www.vieka.com/forum/topic.asp?TOPIC_ID=184
Now it's wait and see.